Determining Website Builder compatibility (v7)

Check these known limitations and requirements to see if's Website Builder editor will work for you.

Using the right website browser

  • Recommended means we think this is the best choice for site editing. This is based on our testing and on customer feedback.
  • Supported means we test this system and will try to resolve any problems. We expect the site editor to perform acceptably on all supported systems.
  • Unsupported means we don't test this system. The site editor may still work but if you have a problem we cannot help you resolve it.

For screen resolution:


  • 1440 x 900 or higher


  • 1280 x 800 or higher
  • It's usually possible to work at 1024 x 768 but it won't be a great experience because it's just plain hard to design a site on a small screen.


  • Under 1024 x 768

The best web browsers for editing the site:


  • Google Chrome (Mac or Windows)


  • Internet Explorer 9 and 10 (Windows)
  • Firefox (Mac or Windows)
  • Safari (Mac only)


 We do not recommend any version of Internet Explorer for site editing. The site editor will work in IE 9 and IE 10 but you will usually get a faster, smoother more reliable experience with Google Chrome. This is based on our experience and feedback from our customers. It is possible to use the site editor in IE8, but you will have very poor experience because IE8 has many known problems. We do not support any version of Opera or any version of Safari for Windows.  

Site editing requires the use of a keyboard and a mouse, touchpad or similar pointing device. We do not support site editing using any kind of touch-screen, pen, voice control or other non-standard device attached to a computer.

Published sites should work on all browsers that support CSS3 / HTML 5. This includes browsers on Android devices and iOS devices. Some browsers, like very old versions of Internet Explorer, have well documented problems with CSS and so you may find some degradation in the appearance of a page although the content should remain fully visible.

We test with the current version of Mac OS X and Windows and the previous major versions too. Currently, that is Windows 7 and Windows 8, Mac OS X 10.7.x and 10.8.x

The site editor should work with any version of Windows from Vista onwards or any version of Mac OS X version after 10.1, but we cannot promise anything as we do not test on these older systems.

We do not test on any version of Linux. We do not support Phones or Tablets for editing websites. We do not support site editing with:

  • Any version of Opera
  • Internet Explorer 6, 7 or 8
  • Safari (Windows)

General limitations

The site editor is intended to be used for creating websites for small businesses and organizations. If used reasonably and in accordance with the documentation, it should work well and we will be happy to try and resolve any problems. If you use the site editor contrary to the documentation or for some other purpose we may be unable to help you.

The site editor is not intended to be used for storing thousands of images or videos. There is no fixed upper limit but if you need to store huge numbers of files you should look for a specialist service.

  • Max image size is 10Mb
  • Max video file size is 20Mb

We recommend you host videos using a service like YouTube or Vimeo and use the appropriate widget to embed these within your site. The supported file types are:

  • JPG / JPEG
  • PNG
  • GIF
  • PDF
  • MP3, MP4

There is no fixed upper limit on page count but we don't test beyond 50 pages.

We do not recommend having more than 30 widgets on a page because this will probably make the page very slow to load.

There is no fixed upper limit on image count but we do not test beyond 100 images or support more than 200.

  • Minimum supported dimensions: 10 x 10 px
  • Maximum supported dimensions: 1920 x 1920 px

For slideshows, we support a maximum of 10 images per carousel and no more than 3 carousels on a page. More than this will make the page very slow to load.

The mobile editor includes the ability to preview a site at a resolution similar to that of common devices like an iPhone and iPad. This preview is intended to act as a guide and we cannot guarantee that the preview will exactly match any particular device.

We do not provide any hosting for .js files (or any other scripting languages). You can embed iFrame content using the Embed widget and you can add scripts to page headers and page bodies. If you paste your own Javascript into a page and you break your site we will not be able to help. Unfortunately, we cannot help you debug any code you may put on your site.

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